which formula represents a double displacement reaction?\no ca(oh)₂(s) → cao(s) + h₂o(g)\no c₂h₅oh(l) +…

which formula represents a double displacement reaction?\no ca(oh)₂(s) → cao(s) + h₂o(g)\no c₂h₅oh(l) + o₂(g) → co₂(g) + h₂o(g)\no zn(s) + 2hcl(aq) → zncl₂(aq) + h₂(g)\no pb(no₃)₂(aq) + 2hcl(aq) → 2hno₃(aq) + pbcl₂(s)

which formula represents a double displacement reaction?\no ca(oh)₂(s) → cao(s) + h₂o(g)\no c₂h₅oh(l) + o₂(g) → co₂(g) + h₂o(g)\no zn(s) + 2hcl(aq) → zncl₂(aq) + h₂(g)\no pb(no₃)₂(aq) + 2hcl(aq) → 2hno₃(aq) + pbcl₂(s)

Answer

Brief Explanations:

In a double - displacement reaction, the positive and negative ions of two ionic compounds exchange places. In the reaction $Pb(NO_3)_2(aq)+2HCl(aq)\rightarrow 2HNO_3(aq)+PbCl_2(s)$, the $Pb^{2 +}$ from $Pb(NO_3)_2$ combines with $Cl^-$ from $HCl$ and $H^+$ from $HCl$ combines with $NO_3^-$ from $Pb(NO_3)_2$. The first reaction is a decomposition reaction, the second is a combustion reaction, and the third is a single - displacement reaction.

Answer:

$Pb(NO_3)_2(aq)+2HCl(aq)\rightarrow 2HNO_3(aq)+PbCl_2(s)$